Feed-guide for trimming and skiving machines.



PATENTED FEB. 25, 1908.

C. S. PIERCE. FEED GUIDE FOR TRIMMING AND SKIVING MACHINES.

APPLICATION FILED DEG.13.1906.

citizen of the United States,

. will curl up CHARLES S. PIERCE,

OF BROCKTON, MASSACHUSETTS.

FEED-GUIDE FOB TRIMMING AND SKIVINGMAGHINESU no. ssopss.

Specification of Letters Patent.

Petented Feb.- 25, 1908.

Application filed December 13. 1906. Serial No. 347.584-

To all whom it may concern:

Be it known that l, (unions S. Plnncn, a residing at Brockton, county of Plymouth, State of Massachusetts, have invented a certain new and useful Improvement in Feed-Guides for Trimming and Skiviug Machines, of which the following is a specification, reference b e ingha-d therein to the accompanying drawmgs.

My invention relates more particularly to skiving or trimming machines of the kind used for skiving or thinning the. edges of pieces of leather or other flexible stock, and is especially adapted to he applied to amachine of the'. kind shown and described in United States Letters Patent No. 273,931, March 13, 1883. in the operation of such a machine as is shown and described in the said patentthe piece of leather is fed to the cutter and the edge thereof-is trimmed or skived. The leather which is thus treated is frequently very soft and flexible and when the end of the: piece of leather is fed into the machine there is great danger that the end and will thus be cut off to a greater or less extent by the cutter. Very great wotchfulness and a considerable degree of skill is required on the part of the operator to avoid this mutilation of the leather.

I A piece of leather thus mutilated is generally unfit for use for the object for which it was designed and in practice a very substantial loss occurs in the use of the skiving machine shown in the said patent above referred to due to the causes to which l have referred, lily invention has tor its ob ect to provide a feed guide oi simple construction by the employment of which the curling ol' the en tering end of the piece ol' leather will be prevented, thereby avoiding the waste hereinabove referred to, and further materially increasing the speed with which the operator may work and conserpiently increasing the output of the machine. I

My invention consists of the feed guide which is fully described in the following specification, taken in connection with the accompanying drawings and the novel features of which. are more particularly pointed out in the claims at the end of the specification.

Referring to the drawings, Figure lis a side view of the head and ad oining parts of a skiving machine showing the machine Sullielently to illustrate the application of my invention thereto. Fig. 2.is a plan View of the end is narrowed down as shown feed guide detached embodying my invention. Fig. .3 [S a section on line J 3 1 lg. 2,

The skiving machine to which myimprovcd feed guide is shown as attached is one ol a type or kind which is extensively used for trimming or skiving the pieces of leather which are employed in the maulacture of boots or shoes. This machine co nprises'a cutting disk located within the housing or guard A, a feeding or guiding disk B and a feed wheel l). in combination with these parts there has previously been employed a fixed guide undcrwhich the piece of leather is passed and which cooperates to guide and direct the leather properly to the cutter. in the application of myinvcnt'ion to the machine referred to, l remove the to which i have referred and under which as I have stated the leather passes on its way to the cutter, and I replace the same with a feed guide embodying my invention and which is shown in edge view in Fig. l and in plan view in Fig. 2 ol' the drawings. The said feed guide comprises a platefl which is mounted upon and secured to a vertical support 3. The plate 2 is of the shape shown in the plan view, Fig. 2, that is the rear portion thereof for about half its length is of considera-ble width in order thatthere may be ample room for the slot 4 throu h which the securing and clamping screw passes and which thereby provides tor the forward or rearward adjustment of the said l'ccd guide as will be clear. The forward end of the said plate 2 tapers and at the extreme forward and is prolly projecting shield or yidcd with a downwari linger (i.

(in top of the plate 2 and at the straight or inner edge thereof there is a spring plate or strip 7, the said strip being lirmly secured at its inner end to the plate 2 by screws 8. The for 'ard end ol the spring strip 7 is free so that it may be pressed upwardly. At the extreme forward end the strip is turned up as shown at ti and a stud is set in the upturned end 9. ()n the stud it) is loosely mounted a tapering roll I l, the stud 10 being headed or otherwise formed so as to prevent the roll 11 from becoming displaced. When 1 he guide is in position in the machine the roll ll projects over the under teed wheel I) and cooperates, therewith by holding the leather down upon the said teed wheel while it is being fed along onto the cutter by means of the guiding and feeding disk B and the said feed wheel I). I

- otherwise firmly secured thereto.

prefer to employ a fixed guide piece 20 in ad: dition to the roll 11, the said fixed guide 20 being located between the roll and the cutter and closely adjacent to theroll, althou h for certain kinds of work it might be possible to j obtain fairly good results without the use of the said fixed guide. The fixed guide 20 is l curved on that face thereof next the roll 11 to fit the said roll, asshown more clearly in i Fig. 3.. In this way. the lower edge of the said guide 20 projects well under the roll and l serves to hold the stock down evenly in its passage from the roll to the cutter. The fixed guide piece 20 projects rearwardly and has a portion 21 which overlies the strip or plate 7 as shown Fig. 2 and is brazed or The taper l of the idler roll -11 should correspond sub- I stantially with the taper of the feed wheel D and may be varied in accordance with the work to be performed. Ordinarily for skiving the curved edges of leather parts of boots and shoes the feed wheel is of slightly conical shape and I have so shown it in the accompanying drawings, and have likewise shown a conical idler roll on my improved feed guide adapted to cooperate with such a conical feed wheel D as I have shown.

In practice the operator presents the end of the piece of leather under the idler roll 11 of the feed guide and the tendency of the parts in operation is to keep the end flat and present it properly to the cutter instead of permitting it to curl up and allowing it to pass improperly to the cutter. Since the operator is relieved from the necessity of very carefully guarding against the curling u of the end of the leather, the speed with which the skiving operation is performed is considerably increased as is also the output of the machine. As will be clear the s iring 7 upon the end of whiclrthe idler roll 11 is mounted will yield upwardly as a piece of leather 'passes under the roll and thus the leather is not only held in place while it is being fed forward, but leather of different i thicknesses is provided for.

It is fre uently desirable 11 vertical y to ada )t it more perfectly to the feeding of certain frinds of stock. For this purpose I provide a simple thumb screw shown at 22 which passes through the strip or plate 7 and the end of which bears against the plate 2 directly underneath the plate 7. The said thumb screw is also provided with 1 adjusting means to adjust the roll a check nut 23 by means of which it may be. set at any desired point.

What I claim is: v

1. In a machine of the character described, the combination with a rotary cutting disk and feeding mechanism, of a tapering roll and a fixed guide -between the said roll and the said cutting disk, said uide serving to guide the stock in its passage rom said roll to said cutting disk.

In a machine of the character described, the combination with a rotary cutting disk and feeding mechanism, of a roll and a fixed guide bet-ween the said roll and the said cutting disk, said fixed guiile having a contour on the side toward the said roll corresponding to the' adjacent portion of the said roll.

3. In a machine of the character described, thecombination with a rotary cutting disk and feeding mechanism, of a roll loosely mounted on a yielding vertically adjustable support and a fixed guide between the said roll and the said cutting disk, said guide being also mounted on said vertically adjustable support to effect the simultaneous adjustment of the roll ing their relative adjustment.

.4. In a machine of the character described,

the combination with a rotary cutting disk and feeding mechanism, of a tapering roll loosely mounted and a fixed guide between the said roll and the said cutting disk.

5. In a machine of the character described,

the combination with a rotary cutting disk and a tapering fee'd wheel, of a roll tapering to correspond with the said feed wheel and a fixed guidebetween the said roll and the said cutting disk, said fixed guide having a contour on theside toward the roll corresponding to the adjacent portion of the said roll.

6. In a machine of the character described, the combination. with cutting and feeding mechanism, of a s ring mounted vertically adjustable roll anr guide, said guide being between said roll and said cutting mechanism and being fixed relatively to said roll and to effect the simultaneous adjustment of said roll and guide.

In testimony whereof affix my signature,

in presence of two witnesses.

CHARLES S. PIERCE.

Witnesses WILLIAM A. MAcLEoD, ALICE H.'MoImIsoN.

and guide without chang- I 

